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Note J - Supplemental Cash Flow Information (Detail) - Supplemental cash flow disclosures (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Supplemental disclosures:
Interest paid	$ 2,081	$ 1,578
Income taxes paid, net	12,407	10,047
Non-cash transactions:
Inventory acquired in repossession and payment protection plan claims	$ 27,909	$ 25,706

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The fair value of assets acquired in noncash investing or financing activities.

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